//** All Levels Navigational Menu- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/ddlevelsmenu/
//** Usage Terms: http://www.dynamicdrive.com/notice.htm

//** Current version: 3.02 See changelog.txt for details

if (typeof dd_domreadycheck == "undefined") //global variable to detect if DOM is ready
    var dd_domreadycheck = false

var ddlevelsmenu = {
    enableshim: true, //enable IFRAME shim to prevent drop down menus from being hidden below SELECT or FLASH elements? (tip: disable if not in use, for efficiency)

    arrowpointers: {
        downarrow: ["img/arrow-down.png", 11, 7], //[path_to_down_arrow, arrowwidth, arrowheight]
        rightarrow: ["img/arrow-right.png", 12, 12], //[path_to_right_arrow, arrowwidth, arrowheight]
        showarrow: { toplevel: false, sublevel: true } //Show arrow images on top level items and sub level items, respectively?
    },
    hideinterval: 200, //delay in milliseconds before entire menu disappears onmouseout.
    effects: { enableswipe: true, enableslide: true, enablefade: true, duration: 200 },
    httpsiframesrc: "blank.htm", //If menu is run on a secure (https) page, the IFRAME shim feature used by the script should point to an *blank* page *within* the secure area to prevent an IE security prompt. Specify full URL to that page on your server (leave as is if not applicable).

    ///No need to edit beyond here////////////////////

    topmenuids: [], //array containing ids of all the primary menus on the page
    topitems: {}, //object array containing all top menu item links
    subuls: {}, //object array containing all ULs
    lastactivesubul: {}, //object object containing info for last mouse out menu item's UL
    topitemsindex: -1,
    ulindex: -1,
    hidetimers: {}, //object array timer
    shimadded: false,
    nonFF: !/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent), //detect non FF browsers
    ismobile: navigator.userAgent.match(/(iPad)|(iPhone)|(iPod)|(android)|(webOS)/i) != null, //boolean check for popular mobile browsers

    getoffset: function (what, offsettype) {
        return (what.offsetParent) ? what[offsettype] + this.getoffset(what.offsetParent, offsettype) : what[offsettype]
    },

    getoffsetof: function (el) {
        el._offsets = { left: this.getoffset(el, "offsetLeft"), top: this.getoffset(el, "offsetTop") }
    },

    getwindowsize: function () {
        this.docwidth = window.innerWidth ? window.innerWidth - 10 : this.standardbody.clientWidth - 10
        this.docheight = window.innerHeight ? window.innerHeight - 15 : this.standardbody.clientHeight - 18
    },

    gettopitemsdimensions: function () {
        for (var m = 0; m < this.topmenuids.length; m++) {
            var topmenuid = this.topmenuids[m]
            for (var i = 0; i < this.topitems[topmenuid].length; i++) {
                var header = this.topitems[topmenuid][i]
                var submenu = document.getElementById(header.getAttribute('rel'))
                header._dimensions = { w: header.offsetWidth, h: header.offsetHeight, submenuw: submenu.offsetWidth, submenuh: submenu.offsetHeight }
            }
        }
    },

    isContained: function (m, e) {
        var e = window.event || e
        var c = e.relatedTarget || ((e.type == "mouseover") ? e.fromElement : e.toElement)
        while (c && c != m) try { c = c.parentNode } catch (e) { c = m }
        if (c == m)
            return true
        else
            return false
    },

    addpointer: function (target, imgclass, imginfo, BeforeorAfter) {
        var pointer = document.createElement("img")
        pointer.src = imginfo[0]
        pointer.style.width = imginfo[1] + "px"
        pointer.style.height = imginfo[2] + "px"
        if (imgclass == "rightarrowpointer") {
            pointer.style.left = target.offsetWidth - imginfo[2] - 2 + "px"
        }
        pointer.className = imgclass
        var target_firstEl = target.childNodes[target.firstChild.nodeType != 1 ? 1 : 0] //see if the first child element within A is a SPAN (found in sliding doors technique)
        if (target_firstEl && target_firstEl.tagName == "SPAN") {
            target = target_firstEl //arrow should be added inside this SPAN instead if found
        }
        if (BeforeorAfter == "before")
            target.insertBefore(pointer, target.firstChild)
        else
            target.appendChild(pointer)
    },

    css: function (el, targetclass, action) {
        var needle = new RegExp("(^|\\s+)" + targetclass + "($|\\s+)", "ig")
        if (action == "check")
            return needle.test(el.className)
        else if (action == "remove")
            el.className = el.className.replace(needle, "")
        else if (action == "add" && !needle.test(el.className))
            el.className += " " + targetclass
    },

    addshimmy: function (target) {
        var shim = (!window.opera) ? document.createElement("iframe") : document.createElement("div") //Opera 9.24 doesnt seem to support transparent IFRAMEs
        shim.className = "ddiframeshim"
        shim.setAttribute("src", location.protocol == "https:" ? this.httpsiframesrc : "about:blank")
        shim.setAttribute("frameborder", "0")
        target.appendChild(shim)
        try {
            shim.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
        }
        catch (e) { }
        return shim
    },

    positionshim: function (header, submenu, dir, scrollX, scrollY) {
        if (header._istoplevel) {
            var scrollY = window.pageYOffset ? window.pageYOffset : this.standardbody.scrollTop
            var topgap = header._offsets.top - scrollY
            var bottomgap = scrollY + this.docheight - header._offsets.top - header._dimensions.h
            if (topgap > 0) {
                this.shimmy.topshim.style.left = scrollX + "px"
                this.shimmy.topshim.style.top = scrollY + "px"
                this.shimmy.topshim.style.width = "99%"
                this.shimmy.topshim.style.height = topgap + "px" //distance from top window edge to top of menu item
            }
            if (bottomgap > 0) {
                this.shimmy.bottomshim.style.left = scrollX + "px"
                this.shimmy.bottomshim.style.top = header._offsets.top + header._dimensions.h + "px"
                this.shimmy.bottomshim.style.width = "99%"
                this.shimmy.bottomshim.style.height = bottomgap + "px" //distance from bottom of menu item to bottom window edge
            }
        }
    },

    hideshim: function () {
        this.shimmy.topshim.style.width = this.shimmy.bottomshim.style.width = 0
        this.shimmy.topshim.style.height = this.shimmy.bottomshim.style.height = 0
    },


    buildmenu: function (mainmenuid, header, submenu, submenupos, istoplevel, dir) {
        header._master = mainmenuid //Indicate which top menu this header is associated with
        header._pos = submenupos //Indicate pos of sub menu this header is associated with
        header._istoplevel = istoplevel
        if (istoplevel) {
            this.addEvent(header, function (e) {
                ddlevelsmenu.hidemenu(ddlevelsmenu.subuls[this._master][parseInt(this._pos)].parentNode)
            }, "click")
        }
        this.subuls[mainmenuid][submenupos] = submenu
        header._dimensions = { w: header.offsetWidth, h: header.offsetHeight, submenuw: submenu.offsetWidth, submenuh: submenu.offsetHeight }
        this.getoffsetof(header)
        submenu.parentNode.style.left = 0
        submenu.parentNode.style.top = 0
        submenu.parentNode.style.visibility = "hidden"
        submenu.style.visibility = "hidden"
        this.addEvent(header, function (e) { //mouseover event
            if (ddlevelsmenu.ismobile || !ddlevelsmenu.isContained(this, e)) {
                var submenu = ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
                if (this._istoplevel) {
                    ddlevelsmenu.css(this, "selected", "add")
                    clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
                }
                ddlevelsmenu.getoffsetof(header)
                var scrollX = window.pageXOffset ? window.pageXOffset : ddlevelsmenu.standardbody.scrollLeft
                var scrollY = window.pageYOffset ? window.pageYOffset : ddlevelsmenu.standardbody.scrollTop
                var submenurightedge = this._offsets.left + this._dimensions.submenuw + (this._istoplevel && dir == "topbar" ? 0 : this._dimensions.w)
                var submenubottomedge = this._offsets.top + this._dimensions.submenuh
                //Sub menu starting left position
                var menuleft = (this._istoplevel ? this._offsets.left + (dir == "sidebar" ? this._dimensions.w : 0) : this._dimensions.w)
                if (submenurightedge - scrollX > ddlevelsmenu.docwidth) {
                    menuleft += -this._dimensions.submenuw + (this._istoplevel && dir == "topbar" ? this._dimensions.w : -this._dimensions.w)
                }
                submenu.parentNode.style.left = menuleft + "px"
                //Sub menu starting top position
                var menutop = (this._istoplevel ? this._offsets.top + (dir == "sidebar" ? 0 : this._dimensions.h) : this.offsetTop)
                if (submenubottomedge - scrollY > ddlevelsmenu.docheight) { //no room downwards?
                    if (this._dimensions.submenuh < this._offsets.top + (dir == "sidebar" ? this._dimensions.h : 0) - scrollY) { //move up?
                        menutop += -this._dimensions.submenuh + (this._istoplevel && dir == "topbar" ? -this._dimensions.h : this._dimensions.h)
                    }
                    else { //top of window edge
                        menutop += -(this._offsets.top - scrollY) + (this._istoplevel && dir == "topbar" ? -this._dimensions.h : 0)
                    }
                }
                submenu.parentNode.style.top = menutop + "px"
                if (ddlevelsmenu.enableshim && (ddlevelsmenu.effects.enableswipe == false || ddlevelsmenu.nonFF)) { //apply shim immediately only if animation is turned off, or if on, in non FF2.x browsers
                    ddlevelsmenu.positionshim(header, submenu, dir, scrollX, scrollY)
                }
                else {
                    submenu.FFscrollInfo = { x: scrollX, y: scrollY }
                }
                ddlevelsmenu.showmenu(header, submenu, dir)
                if (!ddlevelsmenu.ismobile) {
                    if (e.preventDefault)
                        e.preventDefault()
                    if (e.stopPropagation)
                        e.stopPropagation()
                }
                else { //if is mobile
                    if (header._istoplevel || e.target.parentNode.getElementsByTagName('ul').length > 0) { //if user clicks on a header (instead of a menu item)
                        e.preventDefault()
                        e.stopPropagation()
                    }
                }
            }
        }, (this.ismobile) ? "click" : "mouseover")
        this.addEvent(header, function (e) { //mouseout event
            var submenu = ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
            if (this._istoplevel) {
                if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(submenu.parentNode, e)) //hide drop down div if mouse moves out of menu bar item but not into drop down div itself
                    ddlevelsmenu.hidemenu(submenu.parentNode)
            }
            else if (!this._istoplevel && !ddlevelsmenu.isContained(this, e)) {
                ddlevelsmenu.hidemenu(submenu.parentNode)
            }

        }, "mouseout")
    },

    setopacity: function (el, value) {
        el.style.opacity = value
        if (typeof el.style.opacity != "string") { //if it's not a string (ie: number instead), it means property not supported
            el.style.MozOpacity = value
            try {
                if (el.filters) {
                    el.style.filter = "progid:DXImageTransform.Microsoft.alpha(opacity=" + value * 100 + ")"
                }
            } catch (e) { }
        }
    },

    showmenu: function (header, submenu, dir) {
        if (this.effects.enableswipe || this.effects.enablefade) {
            if (this.effects.enableswipe) {
                var endpoint = (header._istoplevel && dir == "topbar") ? header._dimensions.submenuh : header._dimensions.submenuw
                submenu.parentNode.style.width = submenu.parentNode.style.height = 0
                submenu.parentNode.style.overflow = "hidden"
            }
            if (this.effects.enablefade) {
                submenu.parentNode.style.width = submenu.offsetWidth + "px"
                submenu.parentNode.style.height = submenu.offsetHeight + "px"
                this.setopacity(submenu.parentNode, 0) //set opacity to 0 so menu appears hidden initially
            }
            submenu._curanimatedegree = 0
            submenu.parentNode.style.visibility = "visible"
            submenu.style.visibility = "visible"
            clearInterval(submenu._animatetimer)
            submenu._starttime = new Date().getTime() //get time just before animation is run
            submenu._animatetimer = setInterval(function () { ddlevelsmenu.revealmenu(header, submenu, endpoint, dir) }, 10)
        }
        else {
            submenu.parentNode.style.visibility = "visible"
            submenu.style.visibility = "visible"
        }
    },

    revealmenu: function (header, submenu, endpoint, dir) {
        var elapsed = new Date().getTime() - submenu._starttime //get time animation has run
        if (elapsed < this.effects.duration) {
            if (this.effects.enableswipe) {
                if (submenu._curanimatedegree == 0) { //reset either width or height of sub menu to "auto" when animation begins
                    submenu.parentNode.style[header._istoplevel && dir == "topbar" ? "width" : "height"] = (header._istoplevel && dir == "topbar" ? submenu.offsetWidth : submenu.offsetHeight) + "px"
                }
                submenu.parentNode.style[header._istoplevel && dir == "topbar" ? "height" : "width"] = (submenu._curanimatedegree * endpoint) + "px"
                if (this.effects.enableslide) {
                    submenu.style[header._istoplevel && dir == "topbar" ? "top" : "left"] = Math.floor((submenu._curanimatedegree - 1) * endpoint) + "px"
                }
            }
            if (this.effects.enablefade) {
                this.setopacity(submenu.parentNode, submenu._curanimatedegree)
            }
        }
        else {
            clearInterval(submenu._animatetimer)
            if (this.effects.enableswipe) {
                submenu.parentNode.style.width = submenu.offsetWidth + "px"
                submenu.parentNode.style.height = submenu.offsetHeight + "px"
                submenu.parentNode.style.overflow = "visible"
                if (this.effects.enableslide) {
                    submenu.style.top = 0;
                    submenu.style.left = 0;
                }
            }
            if (this.effects.enablefade) {
                this.setopacity(submenu.parentNode, 1)
                submenu.parentNode.style.filter = ""
            }
            if (this.enableshim && submenu.FFscrollInfo) //if this is FF browser (meaning shim hasn't been applied yet
                this.positionshim(header, submenu, dir, submenu.FFscrollInfo.x, submenu.FFscrollInfo.y)
        }
        submenu._curanimatedegree = (1 - Math.cos((elapsed / this.effects.duration) * Math.PI)) / 2
    },

    hidemenu: function (submenu) {
        if (typeof submenu._pos != "undefined") { //if submenu is outermost DIV drop down menu
            this.css(this.topitems[submenu._master][parseInt(submenu._pos)], "selected", "remove")
            if (this.enableshim)
                this.hideshim()
        }
        clearInterval(submenu.firstChild._animatetimer)
        submenu.style.left = 0
        submenu.style.top = "-1000px"
        submenu.style.visibility = "hidden"
        submenu.firstChild.style.visibility = "hidden"
    },


    addEvent: function (target, functionref, tasktype) {
        if (target.addEventListener)
            target.addEventListener(tasktype, functionref, false);
        else if (target.attachEvent)
            target.attachEvent('on' + tasktype, function () { return functionref.call(target, window.event) });
    },

    domready: function (functionref) { //based on code from the jQuery library
        if (dd_domreadycheck) {
            functionref()
            return
        }
        // Mozilla, Opera and webkit nightlies currently support this event
        if (document.addEventListener) {
            // Use the handy event callback
            document.addEventListener("DOMContentLoaded", function () {
                document.removeEventListener("DOMContentLoaded", arguments.callee, false)
                functionref();
                dd_domreadycheck = true
            }, false)
        }
        else if (document.attachEvent) {
            // If IE and not an iframe
            // continually check to see if the document is ready
            if (document.documentElement.doScroll && window == window.top) (function () {
                if (dd_domreadycheck) {
                    functionref()
                    return
                }
                try {
                    // If IE is used, use the trick by Diego Perini
                    // http://javascript.nwbox.com/IEContentLoaded/
                    document.documentElement.doScroll("left")
                } catch (error) {
                    setTimeout(arguments.callee, 0)
                    return;
                }
                //and execute any waiting functions
                functionref();
                dd_domreadycheck = true
            })();
        }
        if (document.attachEvent && parent.length > 0) //account for page being in IFRAME, in which above doesn't fire in IE
            this.addEvent(window, function () { functionref() }, "load");
    },


    init: function (mainmenuid, dir) {
        this.standardbody = (document.compatMode == "CSS1Compat") ? document.documentElement : document.body
        this.topitemsindex = -1
        this.ulindex = -1
        this.topmenuids.push(mainmenuid)
        this.topitems[mainmenuid] = [] //declare array on object
        this.subuls[mainmenuid] = [] //declare array on object
        this.hidetimers[mainmenuid] = [] //declare hide entire menu timer
        if (this.enableshim && !this.shimadded) {
            this.shimmy = {}
            this.shimmy.topshim = this.addshimmy(document.body) //create top iframe shim obj
            this.shimmy.bottomshim = this.addshimmy(document.body) //create bottom iframe shim obj
            this.shimadded = true
        }
        var menubar = document.getElementById(mainmenuid)
        var alllinks = menubar.getElementsByTagName("a")
        this.getwindowsize()
        for (var i = 0; i < alllinks.length; i++) {
            if (alllinks[i].getAttribute('rel')) {
                this.topitemsindex++
                this.ulindex++
                var menuitem = alllinks[i]
                this.topitems[mainmenuid][this.topitemsindex] = menuitem //store ref to main menu links
                var dropul = document.getElementById(menuitem.getAttribute('rel'))
                var shelldiv = document.createElement("div") // create DIV which will contain the UL
                shelldiv.className = "ddsubmenustyle"
                dropul.removeAttribute("class")
                shelldiv.appendChild(dropul)
                document.body.appendChild(shelldiv) //move main DIVs to end of document
                shelldiv.style.zIndex = 2000 //give drop down menus a high z-index
                shelldiv._master = mainmenuid  //Indicate which main menu this main DIV is associated with
                shelldiv._pos = this.topitemsindex //Indicate which main menu item this main DIV is associated with
                this.addEvent(shelldiv, function () { ddlevelsmenu.hidemenu(this) }, "click")
                var arrowclass = (dir == "sidebar") ? "rightarrowpointer" : "downarrowpointer"
                var arrowpointer = (dir == "sidebar") ? this.arrowpointers.rightarrow : this.arrowpointers.downarrow
                if (this.arrowpointers.showarrow.toplevel)
                    this.addpointer(menuitem, arrowclass, arrowpointer, (dir == "sidebar") ? "before" : "after")
                this.buildmenu(mainmenuid, menuitem, dropul, this.ulindex, true, dir) //build top level menu
                shelldiv.onmouseover = function () {
                    clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
                }
                this.addEvent(shelldiv, function (e) { //hide menu if mouse moves out of main DIV element into open space
                    if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(ddlevelsmenu.topitems[this._master][parseInt(this._pos)], e)) {
                        var dropul = this
                        if (ddlevelsmenu.enableshim)
                            ddlevelsmenu.hideshim()
                        ddlevelsmenu.hidetimers[this._master][this._pos] = setTimeout(function () {
                            ddlevelsmenu.hidemenu(dropul)
                        }, ddlevelsmenu.hideinterval)
                    }
                }, "mouseout")
                var subuls = dropul.getElementsByTagName("ul")
                for (var c = 0; c < subuls.length; c++) {
                    this.ulindex++
                    var parentli = subuls[c].parentNode
                    var subshell = document.createElement("div")
                    subshell.appendChild(subuls[c])
                    parentli.appendChild(subshell)
                    if (this.arrowpointers.showarrow.sublevel)
                        this.addpointer(parentli.getElementsByTagName("a")[0], "rightarrowpointer", this.arrowpointers.rightarrow, "before")
                    this.buildmenu(mainmenuid, parentli, subuls[c], this.ulindex, false, dir) //build sub level menus
                }
            }
        } //end for loop
        this.addEvent(window, function () { ddlevelsmenu.getwindowsize(); ddlevelsmenu.gettopitemsdimensions() }, "resize")
    },

    setup: function (mainmenuid, dir) {
        this.domready(function () { ddlevelsmenu.init(mainmenuid, dir) })
    }

}